<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #r1{color: green}

        .c1{color: blue}

        h1,h2{background-color: yellow}

        input[type='password']{background-color: red}

        *{
            border: 1px solid red;
        }
    </style>
</head>
<body>
    <ul>
        <li id="r1">张学友</li>
        <li class="c1">刘德华</li>
        <li>郭富城</li>
    </ul>
    <h1 class="c1">悟空</h1>
    <h1>八戒</h1>
    <h1>沙僧</h1>
    <h2>刘备</h2>
    <input type="text">
    <input type="password">

</body>
</html>